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From: "Eric van der Vlist" <email@example.com>
> "A Web service is a software system identified by a URI [RFC 2396],
> whose public interfaces and bindings are defined and described using
> XML. Its definition can be discovered by other software systems. These
> systems may then interact with the Web service in a manner prescribed by
> its definition, using XML based messages conveyed by Internet
> "A Web service is a software system identified by a URI [RFC 2396]."
"Web services" are not just CGIs, so I think Eric's definition is not really enough.
The point about web services is that they provide some metadata that allows you
to find or use them: for example, that they may advertise or have schemas.
So that some software can say "I want to find a certain service" or some
other software can also say "tell me what format/schema is being used."